Lineage tracking for probing heritable phenotypes at single-cell resolution

Denis Cottinet, Florence Condamine, Nicolas Bremond, Andrew D. Griffiths, Paul B. Rainey, Arjan de Visser, Jean Baudry, Jérôme Bibette

Research output: Contribution to journalArticleAcademicpeer-review

15 Citations (Scopus)

Abstract

Determining the phenotype and genotype of single cells is central to understand microbial evolution. DNA sequencing technologies allow the detection of mutants at high resolution, but similar approaches for phenotypic analyses are still lacking. We show that a drop-based millifluidic system enables the detection of heritable phenotypic changes in evolving bacterial populations. At time intervals, cells were sampled and individually compartmentalized in 100 nL drops. Growth through 15 generations was monitored using a fluorescent protein reporter. Amplification of heritable changes-via growth-over multiple generations yields phenotypically distinct clusters reflecting variation relevant for evolution. To demonstrate the utility of this approach, we follow the evolution of Escherichia coli populations during 30 days of starvation. Phenotypic diversity was observed to rapidly increase upon starvation with the emergence of heritable phenotypes. Mutations corresponding to each phenotypic class were identified by DNA sequencing. This scalable lineage-tracking technology opens the door to large-scale phenotyping methods with special utility for microbiology and microbial population biology.

Original languageEnglish
Article numbere0152395
JournalPLoS ONE
Volume11
Issue number4
DOIs
Publication statusPublished - 1 Apr 2016

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